Rash?

So I was in the shower, washing my private area. I realized that my inner thigh was a little tender, kinda like I was chafing. I ignored it at first since my thighs are thick and chafing is sometimes bound to happen. But I rubbed to make sure everything was okay and I have a few bumps on my inner thigh, close to my lip. I’m chalking it up to be an allergic reaction to the pads I use, but this is the first time this has happened. (Also I am on my period... could be something with that??) I guess I’m wondering if this has happened to anyone else or like do you have an idea?